参数资料
型号: NCP3163PWR2G
厂商: ON Semiconductor
文件页数: 11/20页
文件大小: 0K
描述: IC REG BUCK BOOST INV ADJ 16SOIC
标准包装: 1
类型: 降压(降压),升压(升压),反相
输出类型: 可调式
输出数: 1
输出电压: 可调至 40V
输入电压: 2.5 V ~ 40 V
PWM 型: 混合物
频率 - 开关: 50kHz ~ 300kHz
电流 - 输出: 3.4A
同步整流器:
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.295",7.50mm 宽)裸露焊盘
包装: 剪切带 (CT)
供应商设备封装: 16-SOIC W
其它名称: NCP3163PWR2GOSCT
NCP3163, NCV3163
Calculation
Step ? Down
Step ? Up
Voltage ? Inverting
V sat
in
* V sat
in
(See Notes 1,2,3)
ton
toff
V
in
V out ) V F
* V sat * V out
V out ) V F
V
V
in
|V out| ) V F
V
off
t on
) 1
off
off
t on
) 1
off
off
t on
) 1
off
ton
?
t
t on
t
?
t
t on
t
?
t
t on
t
CT
32.143 · 10 * 6
f
* 20 @ 10 * 12
32.143 · 10 * 6
f
* 20 @ 10 * 12
32.143 · 10 * 6
f
* 20 @ 10 * 12
off
off
IL(avg)
Iout
I out
t on
t
) 1
I out
t on
t
) 1
D I
D I
D I
Ipk (Switch)
IL(avg) )
L
2
IL(avg) )
L
2
IL(avg) )
L
2
RSC
0.25
Ipk (Switch)
0.25
Ipk (Switch)
0.25
Ipk (Switch)
D I
D I
D I
L
V
in
* V sat * V out
L
t on
V
in
* V sat
L
t on
V
in
* V sat
L
t on
O
O
V ripple(pp)
D IL
1
8 ? CO
2
) (ESR)2
[
t on I out
C
[
t on I out
C
Vout
V
ref
R2
R1
) 1
V
ref
R2
R1
) 1
V
ref
R2
R1
) 1
The following Converter Characteristics must be chosen:
V in ?
V out ?
I out ?
D I L ?
Nominal operating input voltage.
Desired output voltage.
Desired output current.
Desired peak ? to ? peak inductor ripple current. For maximum output current it is suggested that D I L be chosen to be less
than 10% of the average inductor current I L(avg) . This will help prevent I pk (Switch) from reaching the current limit
threshold set by R SC . If the design goal is to use a minimum inductance value, let D I L = 2(I L(avg) ). This will
proportionally reduce converter output current capability.
p ? Maximum output switch frequency.
V ripple(pp) ? Desired peak ? to ? peak output ripple voltage. For best performance the ripple voltage should be kept to a low value
since it will directly affect line and load regulation. Capacitor C O should be a low equivalent series resistance (ESR)
electrolytic designed for switching regulator applications.
NOTES:
NOTES:
NOTES:
NOTES:
1.
2.
3.
3.
V sat ? Saturation voltage of the output switch, refer to Figures 10 and 11.
V F ? Output rectifier forward voltage drop. Typical value for 1N5822 Schottky barrier rectifier is 0.5 V.
The calculated t on /t off must not exceed the minimum guaranteed oscillator charge to discharge ratio of 8, at the minimum
operating input voltage.
Figure 22. Design Equations
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